A pure solid sample of Substance X is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a graph of the results: 110.- 90. - temperature (°C) 70. 50. - 30. 10. 50. heat added (kJ/mol) Use this graph to answer the following questions: What is the boiling point of X ? (check all that apply) O solid What phase (physical state) of X would you expect to find in the flask after 12 kJ/mol of heat has been added? O liquid O gas

What takes more energy: raising water to its boiling point, or making it become water vapor? Why (mention molecular forces)?

O Use the observation in the first column to answer the question in the second column. osoft C W W Microsoft Microsoft 6.52.210... esc At 45 °C, Substance E has a vapor pressure of 146. torr and Substance F has a vapor pressure of 116. torr. observation At 1 atm pressure, Substance A boils at -28. °C and Substance B 56. °C. boils at The enthalpy of vaporization of Substance C is smaller than that of Substance D. ! - Explanation 1 Q S 2 Check 8,976 W 280 Which has a higher enthalpy of vaporization? Substance E Substance F Neither, E and F have the same enthalpy of vaporization. It's impossible to know without more information. Which has a higher vapor pressure? Substance A Substance B Neither, A and B have the same vapor pressure. It's impossible to know without more information. Which has the higher boiling point? Substance C Substance D Neither, C and D have the same boiling point. It's impossible to know without more information. #3 17 E question DEC 10 Pag $ 4 R 27 20 % X tv♫♫ T Seg…

Draw the heating curve for ice at -30.0  °C to steam at 130.0 °C and label the phases on the lines in the heating curve. Show this in your work and upload the file in the last question. In the box below, calculate the  enthalpy ( in kJ)for converting 50.0 g  of ice at -15.0 °C to water at 58.4 °C. (Show work below the heating curve). The specific heat of ice = 2.09 J/g-°C The specific heat of water = 4.184 J/g-°C he specific heat of steam = 1.84 J/g-°C ΔHfus for water = 6.01 kJ/mol ΔHvap for water = 40.67 kJ/mol Enter the numerical value in the box. Give 3 sig figs in your answer.